SL/R231: Is your R231 SL a high mileage car? If so, HOW high?




https://www.autotrader.com/cars-for-...2013&zip=94559
Heres some at 145k and dawgs at 122k
https://mbworld.org/forums/sl-class-...uive-seen.html
Last edited by crconsulting; Aug 9, 2024 at 10:19 PM.




Last edited by ThatsMyDawg; Aug 12, 2024 at 06:54 AM.
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Would you mind if I posted your reply in that thread?
Or you can post with the link;
https://mbworld.org/forums/general-m...t-your-mb.html
Last edited by MB2timer; Aug 20, 2025 at 09:01 PM. Reason: + link




Since I am on the bike a lot during nice weather I will be lucky to get 75 miles per week in the drop top. That number is nothing considering it use to be 75 miles per day when I was commuting.
Since I am on the bike a lot during nice weather I will be lucky to get 75 miles per week in the drop top. That number is nothing considering it use to be 75 miles per day when I was commuting.




You’ll get a nice sugar high, car will gain low end drivability improvement because you are bypassing part of the VVT circuit at the risk of increasing propensity for pre-ignition/detonation..
Part of the VVT’s role is to retard timing which will mitigate the risk of pre-ignition/detonation and possibly LSPI in the idle, off idle and low end circuit. There’s a lot more to it, but in the interest of keeping it basic, we’ll cut to the chase.
I measured the VVT solenoid and showed just why and how it is prematurely advancing cam timing.
Confirmed by MB engineers. Factory position is NOT to bypass this critical part of the oiling system integrated into the engines operational design.
You’ll also be increasing load on tensioners. Looks like about 3x rate from what has actually been shown. No one in that thread has actually torn their engine or top end apart except for the shop (a2d) who found massive tensioner wear. There are no measurable reliability gains. Lots of VooDoo research from outdated MB documents written in the copy department not by engineers, monetized youtube videos, OT postings and misguided mechanical theories. No borescope pictures before MOD or After. Not a SINGLE one.
This is an MBworld/social media phenomenon, as no other brands forums advocate bypass this solenoid (in street cars)
Like I said above, the ONLY person that has actually torn their engine after the “MOD” showed huge chain tensioner wear after only 12k miles….
The general consensus in that thread is, hey, it’s my car, I can do what I want. Which is very true, it’s your car.
You can do whatever you want to it👍
btw a2d Performance actually has a shop that specializes in MB, and also produces aftermarket tuning products for MB. They are actually “hands on”.
Not google search jockeys.
https://modalwork.com/products/m157-...k6Td32e-42yR0i
It’s also worth noting that several engine builders in Germany are reporting intermediate timing sprocket failures (wear) with this “MOD” from increased tension on the chain/tensioners
I urge folks to contact them if you have questions (or doubt their results)
Good Luck!
Last edited by crconsulting; Aug 24, 2025 at 08:13 PM.





